/**
 * Created with IntelliJ IDEA.
 * Description:
 * User:${USER}
 * Date:${YEAR}-${MONTH}-${DAY}
 * ${TIME}
 */
public class Main {
    public static void main(String[] args) {
        System.out.println("Hello world!");
    }
}
class Solution {
    public int search(int[] nums, int target) {
        int left=0,right=nums.length-1;

        while(left<=right){
            int mid=left+(right-left)/2;
            if(nums[mid]>target)right=mid-1;
            else if(nums[mid]<target)left=mid+1;
            else return mid;
        }
        return -1;
    }
}